A light ray of frequency v and wavelength `lambda` enters a liquid of refractive index `3//2`. The ray travels in the liquid with

Options

A. frequency v and wavelength `((2)/(3)) lambda`
B. frequency v and wavelength `((3)/(2)) lambda`
C. frequency v and wavelength ` lambda`
D. frequency `((3)/(2))` v and wavelength `lambda`

Answer

a

Explanation

`mu = ( c )/(v) = (v lambda)/(v lambda ')`
`(3)/(2) = (lambda)/(lambda ')` 0r `lambda ' = (2 lambda)/(3)`
Note that the frequency remains unchanged.